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Vending machine. The time between consecutive uses of a vending machine is Exponential with average 15 minutes.
a. Given that the machine has not been used in the previous 5 minutes, what is the probability that the machine will not be used during the next 10 minutes?
b. How many purchases are expected within the next hour?
c. What is the distribution of the number of purchases to be made within the next hour?
d. Suppose that a person pays 75 cents for each beverage in the vending machine. The supplier pays 40 cents per beverage in the machine, and thus makes a profit of 35 cents per beverage. What is the expected profit made during a given 8 hour period?
1-Explain the operation of common emitter (CE) and common base (CB) in NPN amplifier 2-Explain the operation of common collector (CC) in NPN and PNP amplifiers 3- What is the relationship between the input and the output in NPN and PNP amplifiers and..
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Repeat (a), but this time hold the slot width to 0.5?x and vary the slot length from ?y to 10?y. How does the transmitted amplitude vary with the slot length?
Compute the complex power S (in polar form) drawn by a certain load if it is known that (a) it draws 100 Waverage power at a lagging PF of 0.75; (b) it draws a current I = 9 + j5 A rms when connected to the voltage 120/32 V rms
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Draw a log-log plot of the envelope of the common-mode conducted emission from 150 kHz to 30 MHz.
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